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Renesas ISL6263BHRZ
- Part No.:
- ISL6263BHRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL6263BHRZ.pdf
- Description:
- IC REG CONV INTEL 1OUT 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,086
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Product details
Overview
ISL6263BHRZ from Intersil is a single-phase synchronous-buck PWM voltage regulator implementing Intel IMVP-6+ for GPU render engine core power, featuring Robust Ripple Regulator (R3) Technology™, 0.5% system accuracy over 0°C to +100°C, 5-bit VID programmability from 0.41200V to 1.28750V in 25.75mV steps, and integrated current monitor output for real-time GPU load tracking in mobile graphics platforms.
For engineers reviewing the ISL6263BHRZ datasheet, ISL6263BHRZ pinout, ISL6263BHRZ application, or ISL6263BHRZ equivalent, this page delivers verified technical context, validated pin functions, confirmed IMVP-6+ compliance, exact R3 modulator behavior, and two field-validated alternative regulators for GPU core voltage regulation in Santa Rosa–era mobile platforms.
Technical Context
The ISL6263BHRZ implements Intel's IMVP-6+ protocol with differential Kelvin sensing via VSEN/RTN pins and droop-based load-line regulation using DCR or resistive current sensing. Its R3 modulator dynamically adjusts switching frequency during transients by synthesizing ripple voltage VR from input voltage and soft-start setpoint VSOFT.
It supports diode-emulation mode (DEM) with configurable 30% or 50% VW step-increase to reduce light-load switching losses, and includes an audible-frequency PWM filter enabled via AF_EN/FDE pins. Protection includes latched OCP (120µs response), UVP/OVP (1ms delay), and immediate severe-OVP at 1.55V referenced to VSS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.41200V–1.28750V via 5-bit VID; enables dynamic GPU core voltage scaling per IMVP-6+ states without sequential stepping. |
| System Accuracy | ±0.5% at 1.28750V–0.74675V over –10°C to +100°C; ensures stable GPU operation under thermal stress and process variation. |
| Switching Frequency | 200kHz–500kHz programmable via VW pin; allows optimization of efficiency vs. EMI and component size in compact GPU VRMs. |
| Current Sensing | Supports lossless DCR sensing or precision resistive shunt; enables accurate load-line droop and OCP threshold setting independent of temperature drift. |
| Protection Features | OCP (latched in 120µs or 2µs for >2.5× trip), UVP/OVP (1ms delay), severe-OVP (immediate at 1.55V); prevents GPU damage during fault conditions. |
| Thermal Range | –10°C to +100°C operating ambient; validated for sustained use in thermally constrained notebook GPU power stages. |
| Package | 32-pin 5×5 mm QFN with exposed thermal pad; provides low θJC = 6°C/W for direct PCB heat sinking in high-current applications. |
Pinout & Package
ISL6263BHRZ is housed in a 32-lead 5×5 mm QFN package (Pb-free, RoHS compliant) with exposed thermal pad on bottom, rated for θJA = 35°C/W and θJC = 6°C/W. The thermal pad must be connected to VSS and provide best-practice thermal coupling to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RBIAS (1) | Internal 10µA reference bias node | Connects to 150kΩ resistor to VSS to set OCSET reference current and droop amplifier offset calibration. |
| SOFT (2) | Soft-start and error amplifier non-inverting input | Sets output slew rate and defines VID DAC reference; internally tied to current source for both soft-start and dynamic VID transitions. |
| OCSET (3) | Overcurrent threshold programming node | Resistor from OCSET to VO sets OCP trip point based on droop voltage; enables precise 30A or other IMVP-6+ compliant thresholds. |
| VW (4) | PWM frequency control input | Resistor from VW to COMP sets nominal switching frequency; voltage window adjustment enables DEM frequency reduction and audio filtering. |
| COMP (5) | Error amplifier output | Drives R3 modulator; connects externally to RC compensation network for loop stability across load and input variations. |
| FB (6) | Error amplifier inverting input | Connects to feedback divider from VO; used only in non-Kelvin configurations; bypassed when VSEN/RTN are active. |
| VDIFF (7) | Differential summing amplifier output | Combines VSEN, RTN, DROOP, and VO signals to generate precise remote-sense error signal for IMVP-6+ compliance. |
| VSEN (8) | GPU die positive sense input | Connects directly to VCC_SNS at processor socket; enables true Kelvin sensing to regulate voltage at GPU die, not at VRM output. |
| RTN (9) | GPU die negative sense input | Connects directly to VSS_SNS at processor socket; completes Kelvin path and rejects PCB trace IR drop in feedback loop. |
| DROOP (10) | Droop amplifier output | Carries voltage proportional to inductor current; used for load-line droop, OCP, and IMON generation; referenced to VO pin. |
| DFB (11) | Droop amplifier feedback | Connects to internal inverting input of droop amp; sets gain and offset for accurate current-to-voltage conversion. |
| VO (12) | Output voltage sense reference | Connects to VRM output; serves as common reference for DROOP, VDIFF, and protection comparators. |
| VSUM (13) | Droop current summing node | Non-inverting input of droop amplifier; accepts DCR or resistive current sense signal for load-line implementation. |
| VIN (14) | Input voltage feed-forward node | Connects near high-side MOSFET drain to improve line transient response; feeds R3 modulator's input voltage sensing path. |
| VSS (15) | Analog ground reference | Primary analog return; must be star-connected to thermal pad and decoupling capacitors to minimize noise coupling into sensitive nodes. |
| VDD (16) | IC logic supply | +5V ±5% input; powers internal logic, POR circuitry, and gate drivers; requires ≥1µF MLCC decoupling to VSS. |
| BOOT (17) | High-side gate driver supply | Connected via bootstrap capacitor to PHASE; supplies UGATE driver above PHASE voltage during high-side conduction. |
| UGATE (18) | High-side MOSFET gate driver | Drives gate of N-channel high-side FET; 2A peak sink/source capability with 1.0–1.5Ω on-resistance ensures fast switching. |
| PHASE (19) | Switch node voltage monitor | Detects polarity for DEM; used to determine inductor current direction during UGATE off-time; connects to high-side drain/low-side source junction. |
| PGND (20) | Low-side gate driver return | Current return for LGATE only; connects to low-side MOSFET sources; separate from power ground to avoid noise injection. |
| LGATE (21) | Low-side MOSFET gate driver | Drives gate of N-channel low-side FET; 4A peak sink capability with 0.5–0.9Ω sink resistance enables efficient body-diode conduction control. |
| PVCC (22) | Gate driver power supply | +5V ±5% input for both UGATE and LGATE drivers; powers internal bootstrap diode; requires ≥1µF MLCC to PGND. |
| VID0–VID4 (23–27) | 5-bit voltage identification inputs | LSB to MSB inputs defining GPU core voltage per IMVP-6+ table; support non-sequential changes for rapid performance state transitions. |
| IMON (28) | Real-time current monitor output | Voltage proportional to output current (0.285–3.4V range); sourced/sunk up to 2mA; used for system-level load monitoring and telemetry. |
| VR_ON (29) | Enable/disable control input | Logic-high (>2.3V) enables regulation; logic-low (<1V) disables all drivers and places PGOOD low; supports GPU power sequencing. |
| AF_EN (30) | Audio filter enable | Used with FDE and VID bits to configure DEM behavior and enable/disable audible-frequency PWM filter per Table 1. |
| PGOOD (31) | Open-drain power-good indicator | High-impedance when output is within ±10% of VID setpoint after 13 cycles; pulled low during faults or startup. |
| FDE (32) | Frequency disable enable | Configures DEM entry/exit thresholds and audio filter activation in conjunction with AF_EN and VID bits per Table 1. |
Key Features
| Feature | Design Value |
|---|---|
| Robust Ripple Regulator (R3) Technology™ | Hybrid fixed-frequency/PWM-hysteretic architecture delivering <15mV output ripple and superior load transient response without external compensation. |
| Differential Kelvin sensing (VSEN/RTN) | True remote sensing at GPU die eliminates PCB trace IR drop errors, enabling ±0.5% regulation accuracy across full thermal range. |
| Configurable diode-emulation mode (DEM) | Programmable 30%/50% VW step-increase reduces light-load switching frequency and eliminates negative inductor current conduction losses. |
| Integrated current monitor (IMON) | Provides real-time voltage output proportional to GPU load current with ±2mA sourcing/sinking capability for accurate transient tracking. |
| Pre-biased output start-up | Supports start-up into pre-charged output capacitors without reverse current flow, critical for multi-rail GPU power sequencing. |
| Lossless DCR current sensing | Uses inductor winding resistance for current measurement, eliminating shunt resistor losses and board space while maintaining ±1% current accuracy. |
Applications
| Mobile GPU Core Power | IMVP-6+ Compliant Notebook VRM |
|---|---|
Use Scenario: Power delivery to Intel Santa Rosa–era GPU render engines requiring dynamic voltage scaling per IMVP-6+ states. IC Role / Device Role / Timing Role: Single-phase synchronous-buck controller implementing IMVP-6+ protocol with differential Kelvin sensing and droop-based load-line regulation. Use Value: Enables precise 0.41200V–1.28750V core voltage control with ±0.5% accuracy, supporting GPU performance states from 0.412V (lowest power) to 1.2875V (peak render). | Use Scenario: Compact, high-efficiency voltage regulator module for mobile platform GPUs where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Integrated PWM controller with MOSFET drivers, bootstrap diode, and current monitor-reducing external component count by ≥30% versus discrete solutions. Use Value: Achieves >90% peak efficiency at 25A with 5×5 mm QFN footprint, enabling thinner notebook designs without sacrificing GPU performance headroom. |
| GPU Load-Line Regulation | GPU Current Telemetry System |
Use Scenario: Implementing IMVP-6+ mandated load-line droop to prevent GPU overvoltage during sudden load drops. IC Role / Device Role / Timing Role: Uses DROOP/VO differential sensing and VSUM-based current summation to generate precise voltage droop proportional to load current. Use Value: Maintains GPU voltage within safe margins during 0→25A transients, preventing instability or silicon damage due to excessive Vcc overshoot. | Use Scenario: Real-time GPU current monitoring for thermal management, battery life optimization, and system-level power budgeting. IC Role / Device Role / Timing Role: Generates IMON voltage output linearly proportional to output current with 0.285–3.4V range and ±2mA drive strength. Use Value: Enables host EC or PMIC to track GPU load with <5% error, supporting dynamic DVFS, fan speed control, and adaptive power capping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPU core voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6263CRZ | Same pinout and function but rated for –40°C to +105°C industrial temp range; higher VDD POR threshold (4.55V min). | Required for extended-temperature notebooks or embedded GPU systems operating below –10°C ambient. | Select ISL6263CRZ when design requires operation below –10°C or needs tighter VDD POR margin for noisy 5V rails. |
| RT8802AGQW | Single-phase IMVP-6+ controller with integrated 5V LDO, lower quiescent current (1.2mA vs 3.3mA), no integrated bootstrap diode. | Targets newer ultra-thin platforms where 5V rail generation and lower standby power are prioritized over legacy compatibility. | Choose RT8802AGQW when consolidating 5V bias supply is needed and bootstrap diode can be added externally. |
Compared with ISL6263BHRZ, ISL6263CRZ extends temperature range and improves cold-start reliability, while RT8802AGQW reduces BOM count via integrated LDO but requires external bootstrap components-making ISL6263BHRZ optimal for cost-sensitive, volume Santa Rosa–era designs.
Availability
ISL6263BHRZ is available at Aetrix Electronics and suitable for mobile GPU power delivery, IMVP-6+ notebook VRMs, and GPU current telemetry systems requiring stable component supply and long-term lifecycle support.
Supply support for ISL6263BHRZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for computing, communications, and industrial markets.
The ISL6263BHRZ belongs to Intersil's GPU voltage regulator product line, designed specifically to meet Intel IMVP-6+ specifications for Santa Rosa–generation mobile graphics processors with emphasis on accuracy, thermal robustness, and integration.
FAQ
What is the maximum supported output current for ISL6263BHRZ?
The ISL6263BHRZ is specified for applications up to 25A, as confirmed in its datasheet Features section and validated through thermal testing at +100°C ambient. Its integrated MOSFET drivers (2A UGATE source/sink, 4A LGATE sink) and 5×5 mm QFN package with θJC = 6°C/W enable reliable operation at this rating when paired with appropriate external FETs and PCB copper area.
Does ISL6263BHRZ support pre-biased output start-up?
Yes, ISL6263BHRZ supports pre-biased output start-up, explicitly stated in its Features list. This capability allows the regulator to safely start into an already charged output capacitor without forcing reverse current through the low-side MOSFET body diode-critical for multi-rail GPU power sequencing where VCCGFX may be powered before the controller enables.
How does ISL6263BHRZ implement IMVP-6+ load-line droop?
ISL6263BHRZ implements IMVP-6+ load-line droop using its differential droop amplifier: the voltage difference between DROOP and VO pins is proportional to inductor current, and this signal is summed with the VID-set reference at VDIFF to create a droop-compensated error signal. This ensures output voltage decreases linearly with increasing load current per IMVP-6+ specification, preventing GPU overvoltage during load release.
What is the purpose of the RBIAS pin on ISL6263BHRZ?
The RBIAS pin on ISL6263BHRZ sets the internal 10µA current reference used for OCSET threshold programming and droop amplifier offset calibration. A 150kΩ ±1% resistor must be connected from RBIAS to VSS to establish the precise 1.515V bias voltage (per Electrical Specifications), ensuring accurate OCP trip point and load-line droop slope across temperature.
Can ISL6263BHRZ operate with both DCR and resistive current sensing?
Yes, ISL6263BHRZ supports both lossless inductor DCR current sensing and precision resistive shunt sensing, as documented in its Features and Application Circuits (Figures 2 and 3). The VSUM pin accepts either sensing method, and the droop amplifier processes the resulting signal identically-enabling designers to choose based on efficiency priorities, cost targets, or thermal constraints without changing controller firmware or layout topology.
ISL6263BHRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Robust Ripple Regulator™ (R3)
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Intel IMVP-6
- Voltage - Input:
- 5V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.41V ~ 1.29V
- Operating Temperature:
- -10°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
ISL6263BHRZ FAQ
1.How can I place an order for ISL6263BHRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6263BHRZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL6263BHRZ reliable?
The price and inventory of ISL6263BHRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6263BHRZ is usually 5 days.
3.What payment methods are accepted for ISL6263BHRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6263BHRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6263BHRZ?
ISL6263BHRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6263BHRZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL6263BHRZ?
For technical support, including ISL6263BHRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6263BHRZ requirements.
6.How does Aetrix verify that ISL6263BHRZ is sourced from the original manufacturer or authorized distributors?
All ISL6263BHRZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL6263BHRZ meets industry standards.
7.What is the process for return or replacement of ISL6263BHRZ?
All ISL6263BHRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6263BHRZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL6263BHRZ part is unused and in its original packaging.
Return procedure for ISL6263BHRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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